EDT to Boulder Time Converter
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Quick answers
Selected conversion
8:00 am08:00 EDT (UTC-4), Oct 12, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 12, 2026
EDT is 2 hours ahead of Boulder.
How the time difference changes
For most of the year, EDT is 2 hours ahead of Boulder. From Nov 1, 2026 to Mar 14, 2027, EST is 2 hours ahead of Boulder. Briefly around clock changes, EDT is 3 hours ahead of Boulder or EST is 1 hour ahead of Boulder.
For most of the year, working hours of 9:00 am to 5:00 pm in EDT correspond to 7:00 am to 3:00 pm in Boulder. At other times of the year, working hours of 9:00 am to 5:00 pm in EST correspond to 7:00 am to 3:00 pm in Boulder.For most of the year, working hours of 09:00 to 17:00 in EDT correspond to 07:00 to 15:00 in Boulder. At other times of the year, working hours of 09:00 to 17:00 in EST correspond to 07:00 to 15:00 in Boulder.
Compare EDT time with Boulder time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Eastern Daylight Time is 2 hours ahead of MDT (Mountain Daylight Time).
8:00 am08:00 in EDT is 6:00 am06:00 in Boulder, CO, USA
EDT to Boulder call time
Best time for a conference call or a meeting is between 11am-5pm11:00-17:00 in EDT which corresponds to 9am-3pm09:00-15:00 in Boulder
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
6:00 am06:00 MDT (Mountain Daylight Time) (Boulder, CO, USA). Offset UTC -6:00 hours
8:00 am08:00 EDT / 6:00 am06:00 Boulder, CO, USA
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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Eastern Daylight Time
Offset: EDT is 4 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Bahamas, Canada, Haiti, Turks & Caicos Is, United States
Principal Cities: The largest city in the EDT time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.
French: HAE - Heure Avancée de l'Est
Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste
Today all shaded areas are on EDT.
Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Eastern Standard Time (EST).
Start: Eastern Daylight Time (EDT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.
End: Eastern Daylight Time (EDT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.
EDT representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
- Quebec - Military abbreviation for EDT
- Q - short form of 'Quebec'
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST5EDT
- US/East-Indiana
- US/Eastern
- US/Michigan
- AST - Atlantic Standard Time
- EDT - Eastern Daylight Time
- AMT - Amazon Time
- BOT - Bolivia Time
- CDT - Cuba Daylight Time
- CLT - Chile Standard Time
- FKT - Falkland Island Time
- GYT - Guyana Time
- HLV - Hora Legal de Venezuela
- PYT - Paraguay Time
- Q - Quebec Time Zone
- VET - Venezuelan Standard Time
Boulder Time Zone and Facts
Time Zone
MST – Mountain Standard Time, UTC-7 (standard time)